Sand bag filling device



FIG. 1 is a perspective view of a sand bag filling device showing my new design;

FIG. 2 is a right side view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a rear view thereof; and,

FIG. 6 is a bottom view thereof.

The broken line showing is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a sand bag filling device, as shown. 